package transportManagement.servlet;

import java.io.IOException;
import java.security.InvalidParameterException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import accountManagement.Employee;
import transportManagement.TransportBoard;
import transportManagement.Transport;

/**
 * Servlet implementation class ServletEliminaCorsa
 */
@WebServlet("/ServletRemoveTransport")
public class ServletRemoveTransport extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServletRemoveTransport() {
        super();
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doService(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doService(request, response);
	}

    private void doService(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    	try {
    		Object user = request.getSession().getAttribute("user");
        	if(user == null || !(user instanceof Employee)) {
        		throw new InvalidParameterException("Non disponi dei privilegi necessari per accedere alla pagina richiesta");
        	}
    		String transportId = request.getParameter("transportId");
    		Transport transport = new Transport();
    		transport.setTransportId(transportId);
    		
			TransportBoard.getInstance().remove(transport);
			
			request.setAttribute("resultTitle", "Eliminazione corsa");
			request.setAttribute("resultContent", "Eliminazione riuscita");
			request.getRequestDispatcher("/result.jsp").forward(request, response);
		} catch(InvalidParameterException | NullPointerException e) {
			request.setAttribute("error", e.getMessage());
			request.getRequestDispatcher("/errorPage.jsp").forward(request, response);
		}
    }
}
